The question seems to be a little confused about the scientific terminology. The Greek character Beta (
The study of the motions of satellites around the earth uses the term
Geophysical Fluid Dynamics uses the term Beta Plane to describe an approximation made for the coriolis effect.
This are all very different fields of study. But since they all use the same Greek letter to describe an important process or quantity, it's not surprising that a student would get confused. To learn more about Beta Decay, take a look at this video: